Subject: Re: [linux-audio-dev] using soundcards for data communication
From: David Olofson (david_AT_gardena.net)
Date: ke helmi 16 2000 - 23:53:06 EST
On Wed, 16 Feb 2000, Fredrik wrote:
> Sound cards for data communication is a useful idea. It's the way it's done
> today if you want to send digital audio between different devices, e.g. a
> reverb and a mixer. Have you ever seen a digital mixer with a NIC in the
> back? No? How about AES/EBU?
AES/EBU, S/PDIF etc are digital interfaces and need no advanced
modulation/demodulation of the kind used in modems. They use bi-phase
modulation (or rather encoding - mixing data + clock) and similar
methods just to get it all across using a single wire or fibre.
A NIC is actually pretty similar to any high speed serial device, such
as the digital audio interfaces - the main difference is that NICs
are meant for networks rather than point-to-point connections, but
thats just a matter of some extra hardware and protocol features.
//David
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